/*  tBookShelf: TextPlugin
    (C) 2007  TvN (Volodymyr Tarasenko), e-mail: tvntsr@yahoo.com

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#include <stdexcept>
#include <fstream>
#include <locale>

#include "StreamManager.hpp"

StreamManager::StreamManager()
    : is(0)
{}


StreamManager::~StreamManager()
{
    if (is)
        delete is;
}

std::istream& StreamManager::getStream()
{
    if (!is)
    {
        throw std::runtime_error("Stream was not initialed");
    }

    is->clear();

    return *is;
}

std::istream& StreamManager::getStream(const std::string& file_name)
{
    if (is)
    {
        if (file_name == fname)
        {
            is->clear();
            is->seekg(0, std::ios::beg);

            return *is;
        }

        delete is;
    }
     
    static std::locale loc("");
   
    std::auto_ptr<std::ifstream> in(new std::ifstream(file_name.c_str(),
                                                      std::ios_base::binary |
                                                      std::ios_base::in));
    if (in->bad())
    {
        throw std::runtime_error("Cannot open the file");
    }
    in->imbue( loc );

    is = in.release();

    return *is;
}
